如何在mongoose数据库中添加用户信息？

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  name: String,
  email: String,
  password: String
});

const User = mongoose.model('User', userSchema);

mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => {
    console.log('Connected to MongoDB');
  })
  .catch((error) => {
    console.error('Error connecting to MongoDB', error);
  });

const newUser = new User({
  name: 'John Doe',
  email: 'john@example.com',
  password: 'password123'
});

newUser.save()
  .then(() => {
    console.log('User saved to database');
  })
  .catch((error) => {
    console.error('Error saving user to database', error);
  });

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  name: String,
  email: String,
  password: String
});

const User = mongoose.model('User', userSchema);

mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => {
    console.log('Connected to MongoDB');
    
    const newUser = new User({
      name: 'John Doe',
      email: 'john@example.com',
      password: 'password123'
    });
    
    newUser.save()
      .then(() => {
        console.log('User saved to database');
      })
      .catch((error) => {
        console.error('Error saving user to database', error);
      });
  })
  .catch((error) => {
    console.error('Error connecting to MongoDB', error);
  });